Matthew Sparkes writes: "Transistors more than four times smaller than the tiniest silicon ones — and potentially more efficient — can be made using sheets of carbon just one-tenth of a nanometre thick. The transistors are made of graphene, a sheet of carbon atoms in a flat honeycomb arrangement. Graphene makes graphite when stacked in layers, and carbon nanotubes when rolled into a tube. "This new material has properties that suggest it could have a range of powerful applications.""
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